Positive electrode active material for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

• Main Authors: AOKI YOSHINORI, FUJITANI NAOYA, OGASAWARA TAKESHI
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A positive electrode active material for a non-aqueous electrolyte secondary battery according to one embodiment of the present invention contains a lithium transition metal composite oxide that has a layered structure and is represented by general formula LixNiaMnbAlcCodMeO2-y (in the formula, 0.95 < x < 1.05, 0.75 < = a < = 0.95, 0.05 < = b < = 0.25, 0 < = c < = 0.02, 0 < = d < 0.05, 0 < = e < = 0.03, 0 < = y < = 0.05, a + b + c = 1, and M is at least one element selected from the group consisting of Fe, Ti, Si, Nb, Mo, W, and Zr). A compound containing at least one selected from the group consisting of Ca and Sr and at least one selected from the group consisting of W, Mo, Ti and Zr is fixed to the interface between the primary particles inside the secondary particles of the lithium transition metal composite oxide. 实施方式的一例的非水电解质二次电池用正极活性物质包含锂过渡金属复合氧化物，该锂过渡金属复合氧化物具有层状结构且由通式LixNiaMnbAlcCodMeO2-y(式中，0.95＜x＜1.05，0.75≤a≤0.95，0.05≤b≤0.25，0≤c≤0.02，0≤d＜0.05，0≤e≤0.03，0≤y≤0.05，a+b+c＝1，M为选自Fe、Ti、Si、Nb、Mo、W和Zr中的至少一种元